JP2005039839A5 - - Google Patents

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JP2005039839A5
JP2005039839A5 JP2004209293A JP2004209293A JP2005039839A5 JP 2005039839 A5 JP2005039839 A5 JP 2005039839A5 JP 2004209293 A JP2004209293 A JP 2004209293A JP 2004209293 A JP2004209293 A JP 2004209293A JP 2005039839 A5 JP2005039839 A5 JP 2005039839A5
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無線通信チャネルを備える無線システム内で用いる、受信された信号の信号品質を推定するための方法であって、
該無線通信チャネルから、実質的に固定的なやり方にて変調及び符号化された少なくとも一つの欄を含む、信号を受信するステップと、
少なくとも一つの参照欄を、該少なくとも一つの欄及び該無線通信チャネルの少なくとも一つの特性を表すチャネル推定信号に少なくとも基づいて生成するステップと、
信号品質の推定値を、該受信された信号内の該少なくとも一つの欄及び該生成された少なくとも一つの参照欄の関数として生成するステップと、を含むことを特徴とする方法。 A method for estimating signal quality of a received signal for use in a wireless system comprising a wireless communication channel, comprising:
Receiving from the wireless communication channel a signal comprising at least one field modulated and encoded in a substantially fixed manner;
Generating at least one reference field based at least on the at least one field and a channel estimation signal representative of at least one characteristic of the wireless communication channel;
Generating an estimate of signal quality as a function of the at least one column and the generated at least one reference column in the received signal. 該信号品質の推定値を生成するステップが、該少なくとも一つの参照欄と関連する一つ或いは複数の信号点配置と該受信された信号内の該少なくとも一つの欄と関連する一つ或いは複数の対応する信号点配置との間の差を測定する処理を含む、請求項１記載の方法。   Generating the signal quality estimate includes one or more signal constellations associated with the at least one reference field and one or more associated with the at least one field in the received signal; The method of claim 1, comprising the step of measuring a difference between corresponding signal point constellations. 該信号品質の推定値を生成するステップが、該受信された信号内の該少なくとも一つの欄と関連する該一つ或いは複数の信号点配置と該少なくとも一つの参照欄と関連する該一つ或いは複数の対応する信号点配置とを（時間的に）整合させるステップと、
該受信された信号内の該少なくとも一つの欄内の複数のサンプルの少なくとも一部の各々に対して、該受信された信号内の該少なくとも一つの欄と、該対応する少なくとも一つの参照欄との間の差を表す差信号を生成するステップと、を含む請求項２記載の方法。 Generating the signal quality estimate includes the one or more signal point constellations associated with the at least one column in the received signal and the one or more associated with the at least one reference column; Matching (in time) a plurality of corresponding signal point constellations;
For each of at least some of the plurality of samples in the at least one column in the received signal, the at least one column in the received signal and the corresponding at least one reference column; Generating a difference signal representative of the difference between the two. 該受信された信号内の該少なくとも一つの欄を、該少なくとも一つの参照欄の生成に要した遅延時間と実質的に等しい量だけ遅延させるステップをさらに含む請求項１記載の方法。   The method of claim 1, further comprising the step of delaying the at least one field in the received signal by an amount substantially equal to a delay time required to generate the at least one reference field. 該受信された信号内の該少なくとも一つの欄と該少なくとも一つの参照欄との間の差を表す差信号を生成するステップと、
該差信号の規模を決定するステップとをさらに含み、
該信号品質の推定値が該差信号の該規模の関数として表現されるようになっている、請求項１記載の方法。 Generating a difference signal representative of a difference between the at least one field and the at least one reference field in the received signal;
Further determining the magnitude of the difference signal;
The method of claim 1, wherein the signal quality estimate is expressed as a function of the magnitude of the difference signal. 該受信された信号内の該少なくとも一つの欄と該少なくとも一つの参照欄との間の差を表す差信号を生成するステップと、
該差信号の電力を測定するステップとをさらに含み、
該信号品質の推定値が該差信号の少なくとも該電力測定値の関数として表現される、請求項１記載の方法。 Generating a difference signal representative of a difference between the at least one field and the at least one reference field in the received signal;
Measuring the power of the difference signal;
The method of claim 1, wherein the signal quality estimate is expressed as a function of at least the power measurement of the difference signal. 該受信された信号が少なくとも一つの訓練シンボルを含み、該チャネル推定信号が少なくとも一部該受信された信号内の該少なくとも一つの訓練シンボルに基づいて計算されるようになっている、請求項１記載の方法。   The received signal includes at least one training symbol, and the channel estimation signal is calculated based at least in part on the at least one training symbol in the received signal. The method described. 該受信された信号が可変的に変調及び符号化される第二の欄を含み、
該方法が、更に、該第二の欄の変調及び符号化の少なくとも一方を、少なくとも一部、該信号品質の推定値に少なくとも基づいて変化させるステップを含む、請求項１記載の方法。 Including a second column in which the received signal is variably modulated and encoded;
The method of claim 1, further comprising changing at least one of the modulation and coding of the second column based at least in part on the estimate of the signal quality. 無線通信チャネルを備える無線システム内で用いる、受信された信号の信号品質を推定するための方法であって、
該無線通信チャネルから、実質的に固定的なやり方にて変調及び符号化された少なくとも一つの欄を含む信号を受信するステップと、
該受信された信号内の該少なくとも一つの欄に対応する少なくとも一つの特性を測定するステップと、
信号品質の推定値を、該受信された信号内の該少なくとも一つの欄に対応する該少なくとも一つの特性の関数として生成するステップと、を含むことを特徴とする方法。 A method for estimating signal quality of a received signal for use in a wireless system comprising a wireless communication channel, comprising:
Receiving from the wireless communication channel a signal comprising at least one column modulated and encoded in a substantially fixed manner;
Measuring at least one characteristic corresponding to the at least one field in the received signal;
Generating an estimate of signal quality as a function of the at least one characteristic corresponding to the at least one field in the received signal. 無線通信チャネルを通じて通信を行うように構成可能であって送信機及び受信機を含む少なくとも一つのトランシーバを備える無線システム内で用いる、該少なくとも一つのトランシーバのデータ伝送速度を制御するための方法であって、
該無線通信チャネルから、実質的に固定的なやり方にて変調及び符号化された少なくとも一つの欄を含む信号を受信するステップと、
少なくとも一つの参照欄を、該少なくとも一つの欄及び該無線通信チャネルの少なくとも一つの特性を表すチャネル推定信号に少なくとも基づいて生成するステップと、
該受信された信号内の該少なくとも一つの欄と該少なくとも一つの参照欄とを比較し、これに対応する差信号を生成するステップと、
該差信号の関数としての信号品質の推定値を生成するステップと、
該送信機の該データ伝送速度を、該信号品質の推定値に少なくとも基づいて修正するステップと、を含むことを特徴とする方法。 A method for controlling a data transmission rate of at least one transceiver for use in a wireless system configurable to communicate over a wireless communication channel and comprising at least one transceiver including a transmitter and a receiver. And
Receiving from the wireless communication channel a signal comprising at least one column modulated and encoded in a substantially fixed manner;
Generating at least one reference field based at least on the at least one field and a channel estimation signal representative of at least one characteristic of the wireless communication channel;
Comparing the at least one field in the received signal with the at least one reference field and generating a corresponding difference signal;
Generating an estimate of signal quality as a function of the difference signal;
Modifying the data transmission rate of the transmitter based at least on the estimate of the signal quality. 無線通信チャネルを通じて通信を行うように構成可能であって送信機及び受信機を含む少なくとも一つのトランシーバを備える無線システム内で用いる、該少なくとも一つのトランシーバのデータ伝送速度を制御するための方法であって、
該無線通信チャネルから、実質的に固定的なやり方にて変調及び符号化された第一の欄と可変的に変調及び符号化された第二の欄とを含む信号を受信するステップと、
該受信された信号内の該第一の欄に対応する少なくとも一つの特性を測定するステップと、
信号品質の推定値を、該受信された信号内の該第一の欄に対応する該少なくとも一つの特性と該少なくとも一つの特性に対応する少なくとも一つの閾値との間の差の関数として生成するステップと、
該第二の欄の該変調及び符号化の少なくとも一方を、該信号品質の推定値に少なくとも基づいて修正するステップと、を含むことを特徴とする方法。 A method for controlling a data transmission rate of at least one transceiver for use in a wireless system configurable to communicate over a wireless communication channel and comprising at least one transceiver including a transmitter and a receiver. And
Receiving from the wireless communication channel a signal comprising a first column that is modulated and encoded in a substantially fixed manner and a second column that is variably modulated and encoded;
Measuring at least one characteristic corresponding to the first field in the received signal;
Generating an estimate of signal quality as a function of a difference between the at least one characteristic corresponding to the first column in the received signal and at least one threshold corresponding to the at least one characteristic; Steps,
Modifying at least one of the modulation and coding of the second column based at least on the estimate of the signal quality. 無線通信チャネルから受信される、実質的に固定的なやり方にて変調及び符号化された少なくとも一つの欄を含む信号の信号品質を推定するための回路であって、少なくとも一つのコントローラを備え、該コントローラが：
（１）少なくとも一つの参照欄を、少なくとも一部、該受信された信号内の該少なくとも一つの欄及び該無線通信チャネルの少なくとも一つの特性を表すチャネル推定信号に基づいて生成するステップと、
（２）信号品質の推定値を、該受信された信号内の該少なくとも一つの欄及び該生成された少なくとも一つの参照欄の関数として生成するステップとを、遂行するように構成されることを特徴とする回路。 A circuit for estimating the signal quality of a signal received from a wireless communication channel and including at least one column modulated and encoded in a substantially fixed manner, comprising at least one controller, The controller:
(1) generating at least one reference field based at least in part on the at least one field in the received signal and a channel estimation signal representative of at least one characteristic of the wireless communication channel;
(2) generating an estimate of signal quality as a function of the at least one field and the generated at least one reference field in the received signal; Features circuit. 無線通信チャネルから受信される、実質的に固定的なやり方にて変調及び符号化された少なくとも一つの欄を含む信号の信号品質を推定するための回路であって、
少なくとも一つの参照欄を、少なくとも一部、該受信された信号内の該少なくとも一つの欄及び該無線通信チャネルの少なくとも一つの特性を表すチャネル推定信号に基づいて生成するように構成されたプロセッサと、
該プロセッサに接続された比較器とを備え、該比較機が信号品質の推定値を該少なくとも一つの参照欄と該受信された信号内の該一つの欄との間の差の関数として生成するように構成されることを特徴とする回路。 A circuit for estimating the signal quality of a signal received from a wireless communication channel and comprising at least one column modulated and encoded in a substantially fixed manner,
A processor configured to generate at least one reference field based at least in part on the at least one field in the received signal and a channel estimation signal representative of at least one characteristic of the wireless communication channel; ,
A comparator coupled to the processor, wherein the comparator generates a signal quality estimate as a function of a difference between the at least one reference field and the one field in the received signal. A circuit characterized by being configured as follows. 該プロセッサが：
該受信された信号内の該少なくとも一つの欄を受信し、これから該少なくとも一つの欄と関連する複数の受信されたシンボルビットを回復するように構成されたスライサと、
該受信されたシンボルビット内に潜在的に存在する一つ或いは複数の誤りを訂正して、該少なくとも一つの欄内の当初送信されたシンボルビットに対応する訂正された受信シンボルビットを生成するように構成された復号器と、
該訂正された受信されたシンボルビットを符号化するように構成された符号器と、
該訂正及び符号化された受信シンボルビットをベースバンド信号に変換するように構成された変調器と、
該ベースバンド信号と該チャネル推定信号とを結合することで、該少なくとも一つの参照欄を、少なくとも一部、該ベースバンド信号及び該チャネル推定信号に基づいて生成するように構成された乗算器と、を備える請求項１３記載の回路。 The processor:
A slicer configured to receive the at least one field in the received signal and recover a plurality of received symbol bits associated therewith from the at least one field;
Correcting one or more errors potentially present in the received symbol bits to generate corrected received symbol bits corresponding to the originally transmitted symbol bits in the at least one field; A decoder configured to:
An encoder configured to encode the corrected received symbol bits;
A modulator configured to convert the corrected and encoded received symbol bits into a baseband signal;
A multiplier configured to generate the at least one reference field based at least in part on the baseband signal and the channel estimation signal by combining the baseband signal and the channel estimation signal; The circuit of claim 13. 無線通信チャネルを通じて通信するように構成された受信機及び送信機を含むトランシーバを備える無線通信システムのデータ伝送速度を選択的に適応化するための回路であって、少なくとも一つのコントローラを備え、該コントローラが：
（１）該無線通信チャネルから、実質的に固定的なやり方にて変調及び符号化された少なくとも一つの欄を含む信号を受信するステップと、
（２）少なくとも一つの参照欄を、少なくとも一部、該少なくとも一つの欄及び該無線通信チャネルの少なくとも一つの特性を表すチャネル推定信号に基づいて生成するステップと、
（３）該受信された信号内の該少なくとも一つの欄と該少なくとも一つの参照欄とを比較し、これに対応する差信号を生成するステップと、
（４）該差信号の関数としての信号品質の推定値を生成するステップと、
（５）該送信機のデータ伝送速度を、少なくとも一部、該信号品質の推定値に基づいて修正するステップとを、遂行するように構成されることを特徴とする回路。 A circuit for selectively adapting a data transmission rate of a wireless communication system comprising a transceiver including a receiver and a transmitter configured to communicate over a wireless communication channel, the circuit comprising at least one controller, The controller is:
(1) receiving from the wireless communication channel a signal including at least one field modulated and encoded in a substantially fixed manner;
(2) generating at least one reference field based at least in part on the channel estimation signal representing at least one characteristic of the at least one field and the wireless communication channel;
(3) comparing the at least one field in the received signal with the at least one reference field and generating a corresponding difference signal;
(4) generating an estimate of signal quality as a function of the difference signal;
(5) A circuit configured to perform the step of modifying the data transmission rate of the transmitter based at least in part on the estimate of the signal quality. 無線通信チャネルから受信される、実質的に固定的なやり方にて変調及び符号化された少なくとも一つの欄を含む信号の信号品質を推定するための少なくとも一つの回路を含む半導体デバイスであって、該少なくとも一つの回路は、
少なくとも一つのコントローラを備え、該コントローラは、
（１）少なくとも一つの参照欄を、少なくとも一部、該受信された信号内の該少なくとも一つの欄及び該無線通信チャネルの少なくとも一つの特性を表すチャネル推定信号に基づいて生成するステップと、
（２）信号品質の推定値を、該受信された信号内の該少なくとも一つの欄及び該生成された少なくとも一つの参照欄の関数として生成するステップとを、遂行するように構成されることを特徴とする半導体デバイス。 A semiconductor device comprising at least one circuit for estimating the signal quality of a signal received from a wireless communication channel and comprising at least one column modulated and encoded in a substantially fixed manner, The at least one circuit is:
Comprising at least one controller, the controller comprising:
(1) generating at least one reference field based at least in part on the at least one field in the received signal and a channel estimation signal representative of at least one characteristic of the wireless communication channel;
(2) generating an estimate of signal quality as a function of the at least one field and the generated at least one reference field in the received signal; A featured semiconductor device.
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